# Multi-stage Dockerfile for FastAPI application
FROM python:3.11-slim AS builder

WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    gcc \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements
COPY requirements.txt .

# Install Python dependencies
RUN pip install --no-cache-dir --user -r requirements.txt

# Production stage
FROM python:3.11-slim

WORKDIR /app

# Copy dependencies from builder
COPY --from=builder /root/.local /root/.local
COPY --from=builder /app/requirements.txt .

# Copy application code
COPY . .

# Make sure scripts in .local are usable
ENV PATH=/root/.local/bin:$PATH

# Create non-root user
RUN useradd -m -u 1001 appuser && chown -R appuser:appuser /app

USER appuser

EXPOSE 8000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:8000/health')"

CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]